MAP21: Niven's Ravine (Down the Drain)

MAP21: Niven's Ravine is the twenty-first map of Down the Drain. It was designed by Benjogami and uses the music track "Climbing Up the Walls" by.

Secrets

 * 1) Drop into the lava at the start and go behind the building you start in to get a radiation suit. (sector 138)
 * 2) While still in the lava, head southwest into a cave entrance. Go through to medikits and open the door to get a super shotgun, shotgun shells, and the red key. (sector 62)
 * 3) With the red key, head back to the starting point and open the red door to get boxes of rockets and a rocket launcher. (sector 6)
 * 4) When you arrive at the southeast end, after going past the west end of the nearby building, quickly run back north to a compartment that has a soul sphere. (sector 131)
 * 5) Open the north wall in Secret #4 and head east at the fork. Open the next wall to get a megaarmor. (sector 146)
 * 6) Go back to the fork and head west, opening the wall there to get energy cells. (sector 147)
 * 7) At the southeast end, enter the building and enter the lava pool. Go through the east wall to get an invulnerability. (sector 158)

Current records
The records for the map at the Doom Speed Demo Archive are:

The data was last verified in its entirety on April 18, 2023.

Player spawns
This level contains six spawn points:
 * 1) facing north-west. (thing 323)
 * 2) facing south-east. (thing 324)
 * 3) facing south-east. (thing 325)
 * 4) facing east. (thing 326)
 * 5) facing north-east. (thing 328)
 * 6) facing north-west. (thing 329)

Things
This level contains the following numbers of things per skill level: